Prelight is a new Mac OS X application designed to allow a Director of Photography (DoP) and other creatives to freely author, apply and modify looks. The commercial version, PreLight On-Set, extends these tools for the Digital Imaging Technician (DIT) for use during pre-production, production and post.We've designed Prelight to be a long way removed from a complicated colour corrector. It is based on the same simple-to-operate controls that we developed for the DIT's iPad app on our FLIP hardware box.But Prelight is much more than a simple LUT generator, which has limited creativity and no way to convey colour space transforms - the transforms that make the look actually meaningful throughout the post process.Prelight allows images to be colour corrected interactively-by live updating LUT boxes, cameras or monitors directly, or by processing RAW files. Looks can be created and previewed on set or in down time on imported image files, safe in the knowledge that the description of that look is going to be truly relevant and useful.Prelight supports authoring with the full set of Baselight primary and secondary grading tools and these tools behave identically to a full Baselight system, including spatial operations and all applicable inside/outside mattes produced by sophisticated keyers. -